Finding the Fourth Proportional to 391.77, 540.68 and 225.99
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Solution
The fourth proportional to 391.77, 540.68 and 225.99 is: 311.88
Step by Step Solution
- Step 1: Write the proportion equation
391.77 : 540.68 = 225.99 : x - Step 2: Convert to fraction form
391.77/540.68 = 225.99/x - Step 3: Cross multiply
391.77x = 540.68 × 225.99 - Step 4: Simplify right side
391.77x = 122,187.14 - Step 5: Solve for x
x = 122,187.14/391.77 - Step 6: Final answer
x = 311.88
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.